Add use counters for lots of DOM APIs.

third_party/WebKit/Source/modules/serviceworkers/WindowClient.idl

Index: third_party/WebKit/Source/modules/serviceworkers/WindowClient.idl
diff --git a/third_party/WebKit/Source/modules/serviceworkers/WindowClient.idl b/third_party/WebKit/Source/modules/serviceworkers/WindowClient.idl
index bb12d1b14323f3661d1749e5f634e864e17ef5db..ddd3db57cfde39651efff308965aefd8ed50e553 100644
--- a/third_party/WebKit/Source/modules/serviceworkers/WindowClient.idl
+++ b/third_party/WebKit/Source/modules/serviceworkers/WindowClient.idl
@@ -15,8 +15,8 @@ enum ContextFrameType {
     Exposed=ServiceWorker,
     ImplementedAs=ServiceWorkerWindowClient,
 ] interface WindowClient : Client {
-    readonly attribute VisibilityState visibilityState;
-    readonly attribute boolean focused;
-    [CallWith=ScriptState] Promise<WindowClient> focus();
-    [CallWith=ScriptState] Promise<WindowClient> navigate(USVString url);
+    [Measure] readonly attribute VisibilityState visibilityState;
+    [Measure] readonly attribute boolean focused;
+  [Measure, CallWith=ScriptState] Promise<WindowClient> focus();
+  [Measure, CallWith=ScriptState] Promise<WindowClient> navigate(USVString url);
 };